<!DOCTYPE html>
<html lang="en">
<head>
	<meta charset="UTF-8">
	<title>Title</title>
</head>
<body>

</body>
<script>
	// number
	// let num = 100.567;
	// // console.log(new Number(num))
	// const {toFixed} = num;
	// console.log(toFixed.call(num,3))
	
	// 布尔
	let bol = true;
	const {toString} = bol;
	console.log(toString.call(bol))
</script>
</html>